Electrical condenser



Feb. 6', 1923. 1,44%,534

B. AMEs ET AL ELECTRICAL CONDENSER Filed Feb. 15 1918 %%Z/@ZAM PatentedFeb. 6, 1923.

UNITED STATES PATENT OFFICE.

BUTLER AMES AND PHILIP J. GILINSON, OF LOWELL, MASSACHUSETTS; SAIDGILINSON ASSIGNOR TO SAID AMES.

ELECTRICAL CONDENSER.

Application filed February 15, 1918. erial No. 217,441.

To all whom it may concern:

lie it known that we, BUTLER AMES and PHILIP J. GILINsoN, both citizensof the United States, and residents of Lowell, in the county ofMiddlesex and Commonwealth of Massachusetts, have invented new anduseful Improvements in Electrical Condensers, of which the following isa specification.

This invention relates to electrical condensers and has for its object acondenser which is simple to construct, which is compact in form, whichcan be tightly compressed to expel any air trapped therein,

which will fit into a magneto rotor or other restricted space, which hasa. large area of contact between the layers of conducting material andthe terminals, whose layers of insulating material are symmetrical andimperforate, whose layers of conducting material are imperforate andformable from a band or ribbon of material, whose parts are securedtogether by means not extending through the alternate layers ofinsulating and conducting material, and which is of generally improvedconstruction.

of the above objects are attained in the preferred embodiment of ourinvention it is to be understood that certain of these objects may beattained independently in so far as certain aspects of the invention areconcerned;

According to the. present invention the layers of insulati g materialare preferably of substantially s uare formation while the layers ofconducting material are somewhat longer and somewhat more narrow thanthe insulating sheets so that a conducting sheet placed centrally uponan insulating sheet will project beyond the insulating sheet at itsopposite ends but will be confined within the limits of the insulatingsheet at its sides. In building up the condenser layers the alternatelayers of conducting material are disposed at right angles to each otherso that every other layer of conducting material projects from one pairof opposite sides of the insulating sheets and the intermediate layersof conducting material project from the other pair of opposite sides ofthe insulating sheets. The ing ends of each set of conducting sheets areutilized to connect the sheets to terminal plates or other suitabletermi- While all proj ectnals, as by folding the projecting ends overeach other and soldering them to the terminals, and both ends of eachsheet are preferably connected to a terminal so that the current maysurge fto and from the conducting sheets more rapidly. The alternateconducting and insulating sheets are preferably compressed between twoplates, which may be the terminal plates, and the plates are preferablyconnected together by suitable means disposed in the four cornersbetween the projecting ends of the conduct- 1ng sheets.

In the accompanying drawings,

Figure l is an end view of a device embodying our invention;

Figure 2 is an end View of the device showing the opposite end;

Figure 3 is a side elevation of the device;

Figure 4 is a central section on line 4-4 of Fig. 1;.

Figure 5 is a section on line 5-5 of Fig. 3;

Figure 6 is a perspective view of the device; and

Figure 7 is aperspective view of the interior portion of a modifieddevice embodying our invention.

The device illustrated in Figs. 1 to 6 essentially comprises a bodyportion 1 made up of alternate layers of insulating and conductingmaterial, end plates 2 and 3 disposed at opposite ends of the bodyportion, and rivets 4 for securing the end plates together.

The insulating layers of the body portion are in the form of squaresheets 5 having their corners cut off as shown at 6 in Fig. 5. Theconducting layers are in the form of oblong sheets alternate ones ofwhich are disposed at right angle to each so as to form two sets ofconducting sheets 7 andB angularly displaced from each other 90 asindicated in Fig. 5. The conducting sheets extend somewhat beyond theopposite sides of the insulating sheets and at each side are folded overeach other and pressed together with a hot iron or otherwise connectedtogether as indicated at 9, 9, 10 and 10 in Figs. 3 to (3. lVhile theseare the preferred shapes of the insulating and conducting sheets it isbe understood that the shapes may be varied within the scope of theinvention in its broader aspect so long as the conducting layers projectfrom different sides of the condenser so as to be united together.

The end plates 2 and 3 are insulated from the body portion 1 by layersof insulation 11 and 12 and the rivets 4 are insulated from the endplate 2 by insulating washers 13 and bushings 13: Extending from plate 2along one pair of opposite sides of the condenser are two flanges 14 and14, these flanges contacting respectively with the ends of the set 7 ofconducting sheets; and extending from plate 3 along the other pair ofopposite sides of the condenser are two flanges 15 and 16. these flangescontacting respectively with the ends of the set 8 of conducting sheets.A film of solder is preferably flowed in between each of these flangesand the corresponding set of ends of the conducting sheets to insure aperfect contact between each end of each conducting sheet and one of theend plates. When the end plates are utilized as terminal plates they areprovided with terminal lugs 17 and 18, respectively, to which circuitleads may be connected. i

Lugs 19 and 20, extending outwardly from the flanges 15 and 1b of plate3, serve to mount the condenser as shown for example in the applicationof Butler Ames, Sr. No. 21?,168, filed on even date herewith. The plate2 is provided with a tubular projection 21 extending outwardly from thecenter thereof, the projection being tapped to receive a screw forattaching the condenser to other apparatus as disclosed for example insaid copending application.

In Figure 7 we have illustrated a modification in which the body portion1 of the condenser is bound together by two bands 22 and 23 of copperorother conducting material, after which it may be employed thus orbetween end plates as above described. The bands 22 and 23 are insulatedfrom each other by insulation sheets 24, from the conducting layers,except at the ends 9 and 10. by insulation sheets 25 similar to sheet 5in Fig. 5. Theends of the bands are lapped as shown, preferably on thesame side of the body 1.

The preferred method of constructing the body portion of our improvedcondenser is as follows: The layers of conducting mate rial 7 and 8 arepreferably supplied in the form of a ribbon, lengths of the ribbonsufiicient to form the sheets being cut off as the condenser is builtup. Two separate spools of ribbon may be employed, the two spools beingrespectively mounted near adjacent sides of the condenser or nearadjacent sides of a frame having four corner posts spaced the same as.posts 1, in either case of which the set of sheets 7 is obtained fromone spool and the set 8 from the other spool. However, it is deemedpreferable to employ a single spool .and mount the condenser orassembling frame to oscillate back and forth about its axis through anangle of 90' so that a sheet 7 may be applied when in one extremeposition and a sheet 8 when in the opposite position. i

From the foregoing description read in connection with the accompanyingdrawings the advantages of our improved construction will be apparent.The disposition of the oblong conducting sheets between the four cornerposts renders the construction of the apparatus simple and facile.

plates serve to enclose and protect the body portion. to afford aconductin path between the conducting layers and end plates and to carrythe terminal connectors. And by virtue of the conducting path betweeneach end of each conducting sheet and the corresponding terminal platethroughout the entire width of the sheet the-condenser may charge anddischarge more rapidly and efficiently.

We claim:

1. An electrical condenser comprising alternate layers of conducting andinsulating material, the layers of conducting 'material being somewhatlonger than wide and alternate layers of the conducting material beingdisposed transversely of each other so as to project laterally on eachside, and means disposed at least in part in the corners between theprojecting ends for holding the layers together.

2. An electrical condenser of the type having a plurality of platesseparated by a dielectric, the condenser being characterized in that theplates have projections extending outwardly from the sides thereof. theprojections from certain plates at recurrent intervals extending fromone side of the condenser and the projections from certain other platesat recurrent intervals extending from another side of the condenser. andend members extending substantially across the condenser along the endsthereof parallel to said layers, one of the end members being connectedto said'projeetions at one side of the condenser and the other endmember being connected to said projections on the other side of thecondenser.

3. An electrical condenser; comprising alternate sheets of insulatlngand conductlng l1l21tl'ltll, tll alternate conducting sheets alternatesheets of insulating and conducting material, the conducting sheetsbeing divided into two sets respectively comprising alternate sheets ofthe conducting material, one set of conducting sheets extending beyondone pair of opposite sides of the insulating sheets and the other set ofconducting sheets extending beyond the other pair of opposite 1 sides ofthe insulating sheets, and a terminal member contacting with theopposite ends of each set of conducting sheets.

5. An electrical condenser comprising alternate sheets of insulating andconducting material, the conducting sheets being divided into two setsrespectively comprising alternate sheets of-the conducting material, oneset of conducting sheets projecting beyond one pair of opposite sides ofthe insulating sheets and the other set of conducting sheets projectingbeyond the other pair of opposite sides of the insulating sheets, theprojecting portions of each set of conducting sheets being folded overat each end, and a I terminal member extending across the end ingmaterial, the insulating sheets having' of the condenser and contactingwith the folded portions of each set at both ends.

6. An electrical condenser comprising alternate sheets of insulating andconducting material, the conducting sheets being divided into two setsrespectively comprising alternate sheets of the conducting material, oneset of conducting sheets extending beyond one pair of opposite sides ofthe insulating sheets and the other set of conducting sheets extendingbeyond the other pair of opposite sides of the insulating sheets. andend members having opposed portions extending along said pairs of sidesrespectively in electrical contact with the opposite ends of each set ofconducting sheets.

7 An electrical condenser comprising alternate sheets of insulating andconducting material, the conducting sheets being divided into two setsrespectively comprising alternate sheets of the conducting material, oneset of conducting sheets projecting beyond one pair of opposite sides ofthe insulating sheets and the other set of conducting sheets projectingbeyond. the other pair of opposite sidesof the insulating sheets, andmeans disposed in the corners between the projecting ends of therespective sets of conducting sheets for securing said end memberstogether.

8. An electrical condenser comprising alternate sheets of insulating andconductsubstantially the same width as length.

the conducting sheets being somewhat longer and narrower than theinsulating sheets. and the alternate conducting sheets being disposedtransversely of each other and ex tending beyond the edges of theinsulating sheets, and end plates having flanges extending into contactwith the alternate sets of said edges respectively, the flange of oneplate contacting with one set and the flange of the other platecontacting with the other set.

9. An electrical condenser comprising substantially square sheets ofinsulating ma terial, oblong sheets of conducting material, the lattersheets being longer and narrower than the former sheets and beingalternately disposed transversely of each other with their opposite endsprojecting beyond the opposite edges of the insulating layers, endplates disposed on opposite sides of said sheets, each end plate havingportions on opposite sides thereof contacting with said projecting endsof certain of the conducting sheets, and posts for securing said endplates together, the corners of the insulating sheets being cut away andsaid posts being disposed in the cut-away corners between the projectingends of the conducting sheets.

10. An electrical condenser comprising a lternate sheets of insulatingand conducting material, the conducting sheets being longer and narrowerthan the insulating sheets and being alternately arranged transverselyof each other soas .to form two angularly spaced sets of sheets, theends of one set of sheets projecting from .one pair of opposite sides ofthe condenser and the ends of the other set of sheets projecting fromthe other pair of opposite sides of the condenser, a body of conductingmaterial disposed around sait alternate sheets in electrical contactwith the opposite ends of one set of sheets, and a second body ofconducting material disposed around said alternate sheets in electricalcontact with the opposite ends of the other set of sheets.

11. An electrical condenser comprising alternate sheets of insulatingand conducting material, the conducting sheets being divided into twosets respectively comprising alternate sheets of the conductingmaterial, one set of conducting sheets projecting beyond one side of theinsulating sheets and the other set of conducting sheets projectingbeyond another side of the insulating sheets. and end plates disposed atopposite ends of said sheets in planes substantially parallel with theplanes of the sheets, said end plates having flanges extending alongsaid sides in electrical contact with the projecting ends of said setsrespectively.

12. An electrical condenser comprising sheets of conducting material,sheets of insulating material interposed between the conducting sheets,and a. stiff end clamping plate of conducting material disposed in aplane substantially parallel with the planes of said sheets, the ends ofalternate conducting sheets extending beyond the edges of the insulatingsheets into electrical contact'with said clamping plate.

13. An electrical condenser comprising sheets of conducting material,sheets of insulating material interposed between the conducting sheets,and a stiff end clamping plate of conducting material disposed in aplane substantially parallel with the planes of said sheets, the ends ofalternate conducting sheets extending beyond the edges of the insulatingsheets and being soldered directly to said end plate,

14. An electrical condenser comprising sheets of conducting material,sheets of insulating mate-rial interposed between the conducting sheets,and a stiff end plate of conducting material disposed in a planesubstantially parallel with the planes of said sheets, said end platehaving a-fiange extending along the edges of said sheets at one side ofthe condenser in electrical contact with recurrent sheets of conductingmaterial.

Signed by BUTLER AMns at Boston, Mass, this 5th day of February, 1918,and by PHILIP GimNsoN, at Lowell, Mass, this 5th day of February. 1918.

BUTLER AMES, PHILIP J. GILINSON.

